Use of printed labelled information identifying means using plurality lighting mechanism to reduce disturbing light
a technology of lighting mechanism and information identification means, which is applied in the direction of instruments, sensing record carriers, sensing by electromagnetic radiation, etc., can solve the problems of disturbing light, machine-readable code detection and recognition, and interference with the recognition of machine-readable codes, so as to enhance printed label information and reduce the effect of disturbing ligh
Inactive Publication Date: 2019-03-07
CHIU CHI LICK
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Benefits of technology
The present invention provides a system and method for improving the recognition of printed label information by reducing the impact of disturbing light during imaging. The system uses a multi-shot external flashlight and algorithmic control to mitigate the negative impact of disturbing light on printed label information recognition. This helps to improve the reliability and accuracy of printed label information recognition in commercial and industrial applications.
Problems solved by technology
Imaging disturbing light can impede or reduce printed label information recognition.
For example, disturbing light has interfered with machine-readable code detection and recognition of machine-readable codes used in retail applications wherein various image-based and video-based analytics are being developed.
Machine-readable code recognition is a problem mostly due to disturbing light caused by lighting existing in the environment where machine-readable codes are being used.
This problem is further exacerbated when machine-readable codes are covered by clear plastic coatings.
The problem equally applies to the recognition of other patterns or numbers, e.g., such as Machine-readable codes and UPC codes that are used to identify product and inventory and also applies in non-retail applications wherein accurate printed label information detection and recognition is necessary.
Disturbing light refers to saturated regions in images typically caused by reflection from the surface of an object being imaged and can impede recognition of printed information.
For example, when a disturbing light region overlaps a machine-readable code region, image processing cannot resolve the bars in most cases because the machine-readable code may be completely white or wiped out in the images due to gray-level saturation.
An ideal solution is to have an imaging system that does not generate images with disturbing light regions in the first place; but due to the lighting variability in and across stores and the constraints in imaging systems, it is not feasible in practice.
This combination of lighting and imaging geometry and high refection tends to increase the prevalence of disturbing light when imaging labels are located on shelf facing.
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[0018]There is growing interest by retail enterprises in having systems that use image acquisition for accelerating the process of determining the spatial layout of products in a store using printed label information recognition. Although “machine-readable codes” will be described as the label information for purposes of the rest of this disclosure, it should be appreciated that imaging could equally apply to other patterns (e.g., such as Machine-readable codes) and serial numbers (e.g., such as UPC codes). Furthermore, the solutions disclosed herein can apply to several environments including retail, warehouse and manufacturing applications, where identifying machine-readable coded item location is desired. The invention described herein addresses a critical failure mode of such a system. In particular, the present invention is generally aimed at eliminating or reducing the impact of imaging disturbing light (e.g., reflection of the light fixtures, light, etc.) on the overall print...
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Eliminate or reduce the impact of disturbing light in printed information label recognition applications using single- and multi-shot external flashing coupled with intelligent processing. A shelf imager can acquire shelf images for printed information label localization and recognition. An external flashlight can provide at least one flashing condition / pose for shelf image acquisition in addition to lighting associated with the enclosed environment. A disturbing light region (DLR) detector can analyze all or a portion of the acquired shelf images for disturbing light to determine whether additional images need to be acquired using different flashing conditions provided by the single- or multi-shot external flashlight or whether full or portion of acquired images need to be analyzed by a printed information label locator and recognizer. A printed information label locator and recognizer can analyze all or a portion of the acquired images to localize and recognize data printed on the printed information labels.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of application Ser. No. 15 / 696,153, filed Sep. 5th, 2017. Any publications, patents and patent applications referred to herein are incorporated by reference in their entirety to the same extent as if each individual publication, patent or patent application was specifically and individually indicated to be incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]This present disclosure is generally related to systems, devices and / or methods for eliminate or reduce the impact of disturbing light in printed information label recognition applications using single- and multi-shot external flashing coupled with intelligent processing.BACKGROUND OF THE DISCLOSED TECHNOLOGY[0003]Imaging disturbing light can impede or reduce printed label information recognition. For example, disturbing light has interfered with machine-readable code detection and recognition of machine-readable codes used in retail...
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Login to View More IPC IPC(8): G06K7/10G06K7/14
CPCG06K7/1413G06K7/10722
InventorCHIU, CHI LICK
OwnerCHIU CHI LICK